Attack on Titan is a series known for its highs and exceptionally dark lows, and even with some of the more depressing recent events to happen in the manga, the creator of the series is taking all of it in stride.
Reiner Braun is a complicated character within Attack on Titan's lore, and the series creator pays daily tribute to him in a somewhat hilariously awkward way.
Along with some of the sketches you would expect to be hanging in series creator Hajime Isayama's office, you probably didn't expect to see Reiner's suicide attempt among those images.
After the time skip, the manga joins Reiner in Marley, who is suffering from an intense bout of PTSD from his time spent with Eren and the others. He's confronting all sorts of latent feelings and revisiting the death of his former comrade, Marcel. He regrets many of the decision he made on Paradis Island with his other comrades, even including leaving Marco to die after he had found out their secret.
Reiner’s suicidal thoughts came to a head once he stick sa loaded rifle in his mouth as he thought about killing himself. Reiner only stops when he hears Falco, the boy who is trying to save someone else from inheriting the Titan power, and snaps out of it.
This was Reiner's darkest moment in the series, but Isayama clearly has a different view of it. Fans have joked that Isayama enjoys putting his characters through torment, but this adds just a bit of credibility to that theory.
For those unfamiliar with Attack on Titan, the series was originally created by Hajime Isayama. Starting its run in Kondansha's Bessatsu Shonen Magazine in 2009, the series has been collected into 23 volumes as of 2017. It's set in a world where the last remnants of humanity live within a walled city in order to escape the danger of the Titans, a race of giants monsters that eats humans. Eren Yeager joins the military with his two childhood friends Mikasa and Armin after the Titans break through the wall and attack his hometown.
The series was adapted into an anime from Wit Studio and Production I.G. with a third season premiering in 2018. 68 million copies of the manga have been sold as of 2017, and has been met with major critical and commercial success worldwide.